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Optimization of fusion plasma turbulence code on GPU

Asahi, Yuichi  ; Idomura, Yasuhiro  ; Ina, Takuya

Because of its collision-less characteristics, fusion plasmas have fine structures in velocity space. Thus, for the analysis of fusion plasma turbulence which degrades plasma confinement, the five dimensional kinetic models are often employed rather than the usual three dimensional fluid model. In this study, we present the optimization of a fusion plasma code, GT5D, which employs a finite difference method. We then discuss the optimization techniques effective for high dimensional stencil based calculations.



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